Electrical cooking vessel.



F BULLING. ELECTRICAL 0001mm VESSEL.

APPLICATION FILED 00124, 1910. v

Patented June 20, 1911.

INVENTOR v BY vZ/M ATTOk/VEVS binations of parts as hereinafter setforth.

, cation proceeds.

FRIEDRICH Et'lLLING, 0F OBERURSEL, NEAR FRANKFORT-ON-THE-MAIN,GERMANY,ASSIGIII'GR TU THE PROMETHEUS ELECTRIC GOMIPANY, 0.15 NEW YORK, 'Y., A

coaronarron; or new rear.

ELECTRICAL COOKING- VESSEL.

To all whom it may concern: 1

lie it known that I, l! nuconicrr llt'gnnmo, a citizen of the Kingdom ofPrussia, and residing in ()berurscl, near Frankfort-onthe-lv'lain,Germany, have 'ivented certain new and useful improvements in ElectricalCooking Vessels, of which the following is a specification.

This invention relates to electrical cooking vessels and has particularreference to improvements in the arrangement and mounting or the heatingelement on the vessel.

The main objects ofthe invention are to provide a heating element ofsimple and ei'ticient construction; b0 provide means for automaticallycutting oil the supply of current. when the temperature increases beyonda predetermined degree; to mount the heat? ing element on the vesselwithout the use of special fastening means such as screws or the like;and to provide a heating element adapted for use on non-metallicvessels.

Other objects will appear as this specifi- To this end the inventioncomprises such elements, features, arrangements and comin detail, Whilereference is had to the accompanying drawings, which latter, how: ever,are to be read as illustrative only, and in no way as showing the onlypossible embodiment of the invention.

in the said drawings, Figure 1 is an elevation, partly in section, of anelectrical cook,- ing vessel embodying my invention; Fig. 2 is atransverse sectional view on the line 22 of Fig. 1; Fig. 3 shows amodification of the heating element, and Fig. 1 shows'a heating elementadapted for use on nonmetallic vessels.

Referring to Figs. 1 and 2 the reference numeral 5 represents a suitablemetallic cooking vessel, around the lower portion of which there placedthe heating element, the particular construction of which is immaterialztor the purpose of this disclosure, but which in this instance isshownas consisting of a wire 6, provided with a suitableinsulatingcovering (not shown) wound around the vessel. ()utside the heatingelernent there is provided a retaining member 7 in this instance in theform of a metallic ring. A wedge member 8, Fig, 2, is driven l 'the caspecification of Letters Eatent. Pgrtgntgfl Jun e 2Q? M1911 Applicationfiled October 4,

1910. Serial No. 585,204. 7

in between the heating element and the retaining member to secure theseparts firmly to the vessel. The ends of the heating element are bentoutward through suitable openings 20 in the retaining ring 7 andinsulated therefrom to form conducting tingers 9, 9. The openings in thering 7 and the finger 9 covered by a cap 10 to which is secured theterminal bolts 11, 11 adapted to be connected to the electrical conduitsfor supplying the current. The inner ends of the terminal bolts 11 abuttle fingers 9 for transmitting thecurrent to the wire 6. The wedge 8 ispreferably driven in under the retaining ring at the point where the'cap10 is to be placed so as to hide the wedge andenhauce the appearance ofthe device. The cap is soldered at 12 to the ring 7 by means of softsolder which melts when the temperature rises beyond a predetermineddegree. 'iQWhen this happens the solder melts,

falls oil and the current is automatica ly cut oil. The bolts 11 areinsulated from the cap by suitable insulating washers 13, 13.

Fig. 3 shows a heating element which may consistof a coating ofconducting material 14 produced by electrolytieal precipitation on astrip mica or other suitable insulating material 15. A similarinsulating member 16 is placed on the outside of the conducting member.A retaining ring 7 as previously described in connection with Figs. 1and 2 is also provided, together with a wedge 8 for securing the partsfirmly to the vesseh. With this form of heating element I use the caplOand terminals 11 as'abovc described.

The two above described formsof heating elements are suitable for use onmetallic vessels. lreferably the retaining ring 7 and the cap 10 consistof the same metal as the vessel. The edges of the ring 7 are preferablysoldered at 17, 1? to the vessel toprevent'water from reaching theheating element.

The heating means shown in 4L- is suitable for use on non metallicvessels. The heating element and retaining ring are in this instance thesame as shown in Fig. 3 and numbered to correspond, but between thevessel and the heating element there is provided an inner ring 18 havingflanges. 19, 19 which are bent over and soldered to the retaining ring7. The cap 10 is soldered to the ring 7 as before, but the Wedge 8 isinserted between the ring 18 and the vessel so that in this instance theheating means as a whole may be detached from the vessel by removing thewedge.

The above is thought to clearly explain this invention. It will be seenthat I have provided a self-contained heating means for cooking vesselswhich can be attached to the latter without any special fastening meansexcept the insertion of the wedge member; and in the case ofnon-metallic vessels the heating means may be attached and detached atwill.

The invention is susceptible of changes in the detailed constructions,but I claim all such changes as come Within the intended and legitimatescope of the invention and the claims.

I claim and desireto obtain by Letters Patent the following 1. Thecombination of a vessel, a heating element, an outer' retaining memberand a wedge inserted between the latter and the said element forsecuring the retaining member and the heating element to the vessel.

2. The combination of a vessel a heating element, insulating materialplaced on. both sides of the latter, a retaining member and a wedgeinserted between the outer layer of said insulating material and thesaid retaining member for securing the aforesaid parts to the vessel.

3. The combination of a vessel, a heating element wound on the same andinsulated thereironn-a retaining member on the outside of said element,the terminals of the latter projecting through said retaining member, aterminal. cap secured to the said member, terminal bolts in the said capand in contact with the terminals of the said element and meansinterposed between the said retaining member and the said element forsecuring the parts to the vessel.

r 4. ,The combination of a vessel, a heating element surrounding thesame, a retaining member, a Wedge for securing the element and theretaining member to the vessel, a terminal cap, terminal bolts in saidcap and in contact with the terminals of the heating element and afusible element for securing-said cap to the said retaining memher.

5. The combination of a vessel, a heating element surrounding the sameand insulat d therefrom, a retaining member outside 1 element, a capsecured to said member, te"- minal bolts in said cap and in contact withthe terminals of the said element, and a wedge member inserted betweenthe element and said retaining member for secu 'ing the parts to thevessel.

6. The combination of a vessel, a heating element therefor comprising aninsulated conductor, a retaining ring, a wedge inserted between thevessel and the said ring for securing the parts in frictional contactwith the said vessel, openings formed in the said rings for theterminals of the conductor, a cap secured to the ring over the said openings, terminal bolts in said. cap and in corn tact with the terminals ofthe conductor, the

edges of the said ring being soldered to the vessel and a fusibleelement for secun ing the said cap to the ring.

7. The combination of a vessel, a, heating element, an inner and anouter retaining member, means for securing the said two members to oneanother, means for insulating said members from the heating element anda wedge mei'uber inserted between the said vessel and the said innerretai member for securing the parts to the ve; in testimony whereof Ihave signed this specification in the presence of two subscribingwitnesses.

FRIEDRICH liOLLlNG. Witnesses: Ennis V. Bolivia,

Gnonon G. Soniam'nnn'.

